JPS57137803A - Measuring device for three-dimensional shape - Google Patents

Measuring device for three-dimensional shape

Info

Publication number
JPS57137803A
JPS57137803A JP2305581A JP2305581A JPS57137803A JP S57137803 A JPS57137803 A JP S57137803A JP 2305581 A JP2305581 A JP 2305581A JP 2305581 A JP2305581 A JP 2305581A JP S57137803 A JPS57137803 A JP S57137803A
Authority
JP
Japan
Prior art keywords
photodetector
lens
light
measured
point
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2305581A
Other languages
Japanese (ja)
Other versions
JPS6337881B2 (en
Inventor
Mitsuhiko Nakamura
Hiroshi Kuroume
Yoichi Kawada
Shinobu Watanabe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP2305581A priority Critical patent/JPS57137803A/en
Publication of JPS57137803A publication Critical patent/JPS57137803A/en
Publication of JPS6337881B2 publication Critical patent/JPS6337881B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

PURPOSE:To reduce measuring time in a measuring device for three-dimensional shapes using the reflected light from a measuring surface by moving the position of an object to be measured in such a way that more than constant quantity of light is made incident at all times to a photodetector. CONSTITUTION:The light projected from a light emitting element 1 to the point D of an object 6 to be measured and reflected therefrom directs toward a photodetector 2 through a focusing lens 5. The position of the lens 5 is controlled with a motor 11 in such a way that the reflected light is focused onto the surface of the photodetector 2 and that the output of the photodetector is maximized. The distance B between the lens and the photodetector of that time is measured with a digital scale 13. From this and the focal length F of the lens, the distance A between the lens and the object 6 is determined, whereby A+B is obtd. To measure the point E by moving a table 9 in an X direction, a table 7 is so turned as to maximize the quantity of incident light. From the turning angle and A+B of this time, the coordinates of the point E are obtd.
JP2305581A 1981-02-20 1981-02-20 Measuring device for three-dimensional shape Granted JPS57137803A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2305581A JPS57137803A (en) 1981-02-20 1981-02-20 Measuring device for three-dimensional shape

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2305581A JPS57137803A (en) 1981-02-20 1981-02-20 Measuring device for three-dimensional shape

Publications (2)

Publication Number Publication Date
JPS57137803A true JPS57137803A (en) 1982-08-25
JPS6337881B2 JPS6337881B2 (en) 1988-07-27

Family

ID=12099751

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2305581A Granted JPS57137803A (en) 1981-02-20 1981-02-20 Measuring device for three-dimensional shape

Country Status (1)

Country Link
JP (1) JPS57137803A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50103366A (en) * 1974-01-14 1975-08-15
JPS5123763A (en) * 1974-07-22 1976-02-25 Sanyo Kiko Kk KODENSHIKIMUSETSUSHOKUKEIJOSOKUTEISOCHI
JPS5280148A (en) * 1975-12-26 1977-07-05 Mitsubishi Motors Corp Contactless measuring method and apparatus for same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50103366A (en) * 1974-01-14 1975-08-15
JPS5123763A (en) * 1974-07-22 1976-02-25 Sanyo Kiko Kk KODENSHIKIMUSETSUSHOKUKEIJOSOKUTEISOCHI
JPS5280148A (en) * 1975-12-26 1977-07-05 Mitsubishi Motors Corp Contactless measuring method and apparatus for same

Also Published As

Publication number Publication date
JPS6337881B2 (en) 1988-07-27

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